... 16Mn 3.Type:Flat, Slip-on,Bind ,Welding neck etc. LOOSE FLANGE1.Carbon steel flange with different variaties 2.Size: from ... (WNF), blind flange, orifice flange, reducing flange, pad type flange, loose hubbed flange, welding plate flange, welding neck collar, welding-on ... collar, loose plate flange, companion flange and so on.7.Standards: KS ...